Rainbow Death Foam
"Peter! Fuck! Peter Benjamin! Get your ass down here you dumbass child!" Tony's cries rang through the kitchen, carrying up from the genius's workshop as Steve and Natasha looked at Peter skeptically, unaware of the gravity of the situation.
After a few minutes of continuous swearing from Tony, Steve finally approached Peter who was sitting in one of the top corners of the kitchen with a bag of froot loops in his hand, blissfully oblivious to the shouts of his mentor. "Peter? Are you going to go down there to help him or not?"
Peter looked down at the super soldier and grinned. "Nope. Never. Not a chance. Won't even think about it."
Steve blinked in surprise a few times, not used to the spiderling refusing to help someone. "Oh. Alright?" He backed up a bit while watching the young man stand up on the ceiling, spilling froot loops everywhere as he ran from the room. Steve turned to Natasha, confusion written on his face as he made a move towards the stairs to Tony's workshop. "I'm going to go see what's wrong."
"I'm coming with you." Natasha had a strange feeling that something was up between Peter and Tony due to the teenager's odd behavior and the fact that Tony hadn't come charging into the kitchen of the common area yet.
Both Steve and Natasha worked their way cautiously over to the stairs and started down them, careful not to make any sound as they descended the staircase. Steve was the first one down and he froze when he saw what all the commotion was about, causing Natasha to bump into his back before stopping herself. Steve quickly ran to the glass door to the workshop, knocking a few times to get Tony's attention and to get the brunette to stop screaming for one second. "Get me the fuck out of here Capsicle! I don't want to die like this!"
Steve sighed as he unlocked the door with the help of Friday. "Calm down Tony. You aren't going to die. It's not even that bad." Pulling open the door, Steve looked at the wall of foam in front of him that was hundreds of different colors and tried his best not to cringe at the insane neon coloring or laugh at Tony's predicament. The entire workshop was filled with foam that was probably taller than Steve and Tony was stuck swinging from a pipe on the ceiling, clinging to it like a koala. "Come on Tones. Get down from there and just walk to me. It will be completely fine if you just follow my voice."
"For once in my goddamn life Cap, I'm going to ask for your help." He took a deep breath and looked the soldier straight in the eye. "Mainly because I'M FUCKING SHORT AND I'LL SUFFOCATE IN THIS SHIT!"
Steve sighed and rubbed his hand through his hair, looking at the multi colored wall in front of him. "Do you have a leaf blower? Or at least something like that."
Tony smiled darkly. "Yeah I do. It's in the left hand corner of the room. UNDER THE FOAM!"
Steve sighed. "I still can't believe you turned a leaf blower into a flamethrower." Without another word, Steve took a deep breath, closed his eyes, and charged into the foam in the general direction of Tony as Natasha watched, discreetly recording everything.
Tony kept on shouting at Steve as the blonde blindly moved through the workshop towards him until everyone heard a large crash and Steve groaned. "Oh, that's going to leave a mar- OH GOD! It's in my mou- uhhhhhg! So dry! It tastes like sand!" There were various spitting noises followed by coughing as Steve finally climbed on top of a table and was able to catch his breath, quickly wiping away a thick layer of the foam with his hand. After doing his best to wipe off the foam, he was still waist deep in a sick mash of colors and called Friday. "Fri, can you issue an Avengers emergency alert and tell them to get down here?" Coughing even more, Steve tried to spit the taste out of his mouth without much luck, a thick feeling he hadn't felt in years filling his lungs quickly. Steve tried not to let his watery coughs make him double over with the sharp ache in his chest, but he stumbled on the table a bit and nearly fell over backwards, gasping as he felt his chest wheeze painfully.
"No! Friday! Don't do that! Just call Bruce, we need a doctor!" Tony nearly lost his grip on the pipe and fell into the thick foam. He was right and if he had walked through it, he would have suffocated.
Friday's voice had a clipped, serious tone when she responded. "The emergency request has been sent Mr. Rogers. You should expect company in a few seconds."
As if on cue, Clint and Bruce ran down the stairs in a panic, only to stop dead when they saw the foam filling Tony's workplace. Clint turned to Natasha. "Where's Cap?"
"See that big mound of foam a few yards from the monkey hanging from the ceiling?" Natasha frowned at the reaction Clint had to the news that Captain America had fallen into a trap so effectively, but she quickly explained the situation. "Tony got caught in one of Peter's traps and climbed to the ceiling to escape it, but he got stuck and asked for help, so Steve went in and got covered in the stuff. Now he's stuck on the table because this shit does stuff to people."
Clint froze. "What kind of stuff?" More Avengers trailed down into the small space, quickly followed by a panicked Peter who looked around the workshop in surprise.
Without answering Clint, Nat grabbed Peter's shoulder firmly as Steve coughed harder, bending over with the force of the movement. "Pete, we need to know what this stuff is. It's making Steve really sick and we need to know how to fix it."
Peter paled. "This isn't mine. I had a foam bomb, but it was small and white, only supposed to cover a few tables at the most."
T'challa came charging down the stairs after his younger sister who was looking at the Avengers desperately. "Peter is telling the truth! I helped him build it and everything. We were going to test its prank capabilities today on Tony, but sort of chemicals must have been spilt on it to make it much stronger and possibly dangerous." She paused, looking over the faces of the Avengers and looking at Steve who was doubled over in pain. "Okay, so very dangerous. Either way, we need to get the Captain and Tony out of there."
Everyone turned when they heard a large bang from the workshop, Tony nowhere to be seen and Steve kneeling in the foam, ready to keel over from the coughing. “Mother fucker! That hurt!” Everyone ran to the glass windows to make sure that Tony was alright until the foam moved around violently and the genius popped up on the table Steve was on, covered head to toe in bright purple and pink. The brunette grabbed onto Steve’s shoulders, the foam thicker than he thought, reminding him of walking through a giant block of jello when he was bored in his teens except drier than the desert in afghanistan. It was not a pleasant experience and he had nearly suffocated to death before he got out on the other side. Tony latched on tightly to the super soldier, feeling the shakiness of his lungs as he tried to cough out his spleen, blood soaking the front of his shirt, almost invisible in the ruby colored foam all over his arms. “Uh, guys… we need emergency medical right now.”
Before another word was spoken, Sam threw himself into the room quickly followed by Natasha and Vision. They didn’t care if the foam was poisonous or not, they just got in and pulled Steve out as it finally dawned on Wanda that she might be able to help. Tony quickly followed the Avengers that carried Steve as the soldier went quiet, finally passing out from either pain or the amount of blood he coughed up. Wanda couldn’t do anything against the foam though, not even push it to the side, because somehow it canceled out her powers. Peter just stood in the corner, horror and guilt trapped in the tears spilling onto his cheeks as Clint held him back from running towards the heroes so the young man didn’t get covered in the foam too. He was just stuck watching as Bruce ushed all of the heroes covered in rainbow vomit up the stairs, demanding that they should all be quarantined in his lab for safety. Tony refused to let go of Steve’s hand the whole time, swearing and blaming himself as everyone was ushered up the stairs after Sam who was carrying Steve bridal style.